scholarly journals Investigation of mass transfer, thermodynamics, and greenhouse gases properties in pennyroyal drying

2020 ◽  
Vol 43 (8) ◽  
Author(s):  
Mohammad Kaveh ◽  
Hamed Karami ◽  
Ahmad Jahanbakhshi
Keyword(s):  
Mass Transfer ◽  
Greenhouse Gases ◽  
Transfer Thermodynamics

Modelling the Hydrodynamics of Gas-Liquid Packed Beds via Slit Models: A Review

2005 ◽  
Vol 3 (1) ◽  
Author(s):  
Ion Iliuta ◽  
Faical Larachi
Keyword(s):  
Mass Transfer ◽  
Multiphase Flow ◽  
Complex Geometry ◽  
Packed Bed ◽  
Packed Beds ◽  
Reactor Performance ◽  
Two Phase ◽  
Flow Equations ◽  
Considerable Impact ◽  
Transfer Thermodynamics

Packed bed columns are intensively used as multiphase contactors and reactors in chemical, biochemical, and petrochemical industries. Due to two-phase through the packed beds, the performance of multiphase contactors depends on the complex interaction of the interphase mass transfer, thermodynamics and hydrodynamics. Under reaction conditions, the intraparticle mass transfer and reaction kinetics have additional considerable impact on the reactor performance. The inherent complexity of multiphase systems leaves many issues unresolved and leads to many inconsistencies and questionable approximations, especially in the modelling of multiphase flow. Multiphase flow modelling in packed beds is a complicated task because of the difficulty incorporating the complex geometry into the flow equations, and the difficulty in accounting for the gas-liquid interactions in the presence of complex fluid-particle (e.g., partial wetting) contacting. This review focuses on recent advances made in the modelling of the hydrodynamics of two-phase downflow and counter-current flow in packed beds via two-fluid models coupled with slit and double slit phenomenological approximations relating the mutual three phase hydrodynamic interactions.

Mass Transfer Thermodynamics through a Gas–Liquid Interface

2019 ◽  
Vol 123 (11) ◽  
pp. 2576-2584 ◽  
Author(s):  
Alicia Broderick ◽  
M. Alejandra Rocha ◽  
Yehia Khalifa ◽  
Mark B. Shiflett ◽  
John T. Newberg
Keyword(s):  
Mass Transfer ◽  
Liquid Interface ◽  
Transfer Thermodynamics

Teaching Experience in Biotransport Course for Undergraduates of Biomedical Engineering

2011 ◽  
Author(s):  
Lisa X. Xu ◽  
Aili Zhang
Keyword(s):  
Mass Transfer ◽  
Biomedical Engineering ◽  
Teaching Experience ◽  
Bioheat Transfer ◽  
Anatomic Structure ◽  
Equilibrium Length ◽  
Pennes Equation ◽  
Points Of View ◽  
Transfer Thermodynamics ◽  
Energy Conservation Law

For undergraduate student in biomedical engineering, they usually have very limited background of thermodynamics, heat mass transfer. Fundamental concepts of heat and mass transfer, thermodynamics are necessary at the beginning of the course. For this purpose, we found that Prof. John Chato’s book “Fundamentals of Bioheat Transfer” provides good text and it has been used successfully through our teaching. For example, after introducing the energy conservation law, a focused discussion on how the law is used in biological systems (how energy is generated from bio-chemical reactions, et.al) can be launched. Thermal resistance method and radiation network are easily accepted by the BME students as they have strong electrical background. Vasculature is one of the most important factors in bioheat transfer. It is also important in biomedical engineering field. Thus, the anatomic structure, quantification, thermal equilibrium length of blood vessels, are all taught in details. The Pennes equation and its applications are certainly necessary topics and taught right after the temperature measurement technique session. Medical applications, including hyperthermia, thermal ablation, cryosurgery, cryopreservation, burn evaluation etc. are given from both experimental and theoretical points of view. At the end, successful commercial products and models are also introduced.

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